One-pot aqueous synthesis of high quality near infrared emitting Cd1−xHgxTe nanocrystals

An efficient one-pot aqueous synthesis of alloyed Cd1−xHgxTe nanocrystals (NCs) is realized and the influence of the experimental conditions and of the initial composition of the NCs on their optical properties is discussed. This approach obtains stable NCs with an emission tunable in the red and the near infrared (NIR) spectral regions ranging from 640 to 1600 nm thereby covering the second and third telecommunication windows. The high photoluminescence quantum efficiency (PL QE) of these colloids with values up to 55% for red emitting, and up to 60% for NIR emitting samples is indicative of the excellent quality of the NCs.

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